Need good disk dump utility

Paul Koning pkoning at equallogic.com
Mon Apr 25 12:45:55 CDT 2005


>>>>> "Dwight" == Dwight K Elvey <dwight.elvey at amd.com> writes:

 Dwight> Hi Not only should it pad the empty space but it should also
 Dwight> write the buffer values that may have been read if it was
 Dwight> just a crc error on the data portion. These are often just
 Dwight> missing one bit and can be recovered with a little bit of
 Dwight> work.  

That's a great idea if the OS drivers do that.  Typically they do not;
if an error is returned then data is not returned.  What you're
looking for here is a "give me the bits that came across anyway"
feature.  Come to think of it, you also need hardware that offers this
-- some do, some don't.

Analogous example in networking: Ethernet drivers and/or NICs
normallly discard bad packets, but some drivers and NICs can be told
not to do that and deliver packets even if the CRC is bad.

   paul



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